A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6130-00-403-3585
NSN 5925-01-176-6569
NSN 6320-01-569-2672
NSN 5990-01-139-6042
NSN 6320-00-925-0558
NSN 5990-00-557-7443
NSN 6240-01-359-4288
NSN 5945-01-220-6037
NSN 6240-01-413-0734
NSN 2925-01-471-4912
NSN 5835-01-235-9051
NSN 5895-01-126-3943